Understanding the AN960-516 Aerospace Washer: Material Excellence and Unmatched Durability

September 25, 2023 by
Understanding the AN960-516 Aerospace Washer: Material Excellence and Unmatched Durability
Roland Pinto

In the realm of aerospace engineering, every component, no matter how small, plays a pivotal role in the overall performance and safety of an aircraft. The AN960-516 Aerospace Washer is one such component that often passes unnoticed but is crucial to the aircraft assembly. This article examines the material composition and durability of this washer, emphasizing its significance in the aviation industry.

Washers generally go unnoticed and most do not really pay much attention to washers. Their importance is generally unnoticed. So, what is a washer? Why is it important?

A washer is a thin plate (typically disk-shaped) with a hole (typically in the middle) that is normally used to distribute the load of a threaded fastener, such as a bolt or nut. Washers play several crucial roles in various applications, and their importance cannot be understated. Here's a breakdown of the purpose of a washer and why they are essential:

  1. Load Distribution: The primary purpose of a washer is to distribute the pressure uniformly, preventing damage to the surface being fastened. This distribution of load ensures that the fastener doesn't sink into the material.

  2. Spacer: Washers can act as spacers between two components, ensuring that there's a gap or maintaining a specific distance between them.

  3. Vibration Resistance: In machinery or applications with moving parts, vibrations can cause fasteners to loosen over time. Washers, especially lock washers, help prevent this by providing a locking action or by increasing friction.

  4. Leak Prevention: In plumbing or applications involving liquids/gases, washers (often made of rubber in these cases) ensure a tight seal, preventing leaks.

  5. Protection: Washers can protect the surfaces of the materials being joined from being scratched or marred by the bolt or nut.

  6. Corrosion Resistance: Some washers are used to prevent galvanic corrosion by acting as a barrier between two incompatible metals.

  7. Electrical Insulation: In electrical applications, washers made from insulating materials can prevent unwanted electrical paths or short circuits.

  8. Appearance: Washers can also be used for aesthetic reasons, providing a clean and finished look to the assembled parts.

  9. Compensate for Oversized or Misaligned Holes: If a hole is not drilled perfectly or becomes enlarged over time, a washer can help ensure the fastener still holds with the same effectiveness.

  10. Wear Prevention: In dynamic applications where parts move relative to each other, washers can prevent wear on the material surfaces.

In essence, while washers might seem like simple and insignificant components, they play a pivotal role in ensuring the effectiveness, longevity, and safety of many assemblies and applications. Their importance in construction, machinery, automotive, aerospace, and countless other industries is paramount.

Now that we truly understand what a washer is, why we use them, and their importance in the fastening of assemblies, lets return our focus to the AN960-516 washer.

Material Excellence of the AN960-516 Washer

The AN960-516 Aerospace Washer is crafted from high-quality carbon steel. Carbon steel, known for its strength and resilience, is a preferred choice for many aerospace components. The material ensures:

  1. Strength: Carbon steel provides the washer with the necessary strength to withstand the pressures and stresses of aerospace operations.
  2. Flexibility: Despite its strength, carbon steel offers a degree of flexibility, ensuring the washer doesn't crack under pressure.
  3. Resistance to Wear: The material's robust nature ensures that the washer remains unaffected by regular wear and tear, even in challenging aerospace environments.

Cadmium Plated Finish: A Shield of Protection

To further enhance its durability and longevity, the AN960-516 washer features a cadmium plated finish. This finish offers:

  1. Corrosion Resistance: The cadmium plating acts as a barrier, preventing the washer from corroding when exposed to harsh environmental conditions.
  2. Smooth Surface: The plating ensures a smooth surface, which is essential for optimal fitting and preventing any unwanted movement between components.
  3. Aesthetic Appeal: Beyond its functional benefits, the cadmium plated finish gives the washer a sleek, polished look.

Durability that Stands the Test of Time

The combination of carbon steel and the cadmium plated finish ensures that the AN960-516 Aerospace Washer is not just durable but stands the test of time. Its design and material composition make it resistant to:

  • Temperature fluctuations
  • Vibrations during flights
  • Potential chemical exposures in the aviation environment


The AN960-516 Aerospace Washer, with its superior material composition and enhanced durability, is a testament to the meticulous engineering that goes into every aerospace component. Whether you're an aircraft mechanic, engineer, or enthusiast, understanding the significance of such components can provide insights into the intricate world of aerospace assembly and maintenance.

For those in search of genuine aerospace parts, including the AN960-516 washer, Airparts.aero is your trusted source for authentic and reliable components. To look at the AN960-516 washer product page at airparts.aero, click this link:  AN960-516